package c4.demo1.Example4;
class Animal{
    public void shout(){
        System.out.println("动物发出叫声");
    }
}
class Dog extends Animal{
    public void shout(){
        System.out.println("汪汪汪‥‥‥");
    }
}
public class example4 {
    public static void main(String[] args) {
        Dog dog = new Dog();
        dog.shout();
    }
}
